Gas-producing furnace.



P. Gr, SCHMIDT.

GAS PRODUGNG URNAG.

APPLIGATYON FILED MAR. 9, 1906A 9369 3 Patented, flug. l??

j NN N P. G. SCHMIDT.' GAS PRODUGING FURNACE.

APPLICATION FILED MAR. 9, 1908.

' Patented Aug. 10, 1909.

I 4 SHEETS-SHEET 2.

"' lllllllllllllllllll l* @Munition www P. G. SCHMIDT.

GAS PRODUGING FURNAGE.

.APPMGATION FILED MAR4 9, 1908.

Patented Aug. 10, 1909.

4 SHEETq-SHEBT 3 l. uw?! @trof/nc 1go @ffm P. G. SCHMIDT.

GAS PRODUQING'FURNACE. APPLIOATION FILED MAR. 9, 1908.

930,563. LPatented Aug. 1o. 1909.

4 SHEETS-SHEET 4.

PETER e'. SCHMIDT, o TUMWATER, WASHINGTON.

GAS-PBODUOING- FURNAGE .l

no. ecosse.

Specification of Letters Patent.l

Patented Aug. 10, 1909.

Application'flied March 9, 1968. Serial No.' @19,994.

To all whom 'it may concern: Be it known that I, PETER. G. SCHMIDT, e citizenof the United States,residingf et Turnwater; in the countyoln Thurston and .State of Washington, have invented e. new and useful GasfProducing Furnace, of Which the following' isc specification.

`This invention relates to gas producing furnaces. Devices of this character such as heretofore constructed have been i`ound`ob-v from the grate without chilling; the interiore of the furnace, or without putting the-ash pit into communication With'the atmosphere and making' 1t necessary to shut down in or- A der to remove clinkers from the grote.

,The object ol" the present invention is to overcome the above and other disadvantnu'cs incident to the ordinary gras producing' furnaces by providingl novel 'arrangements of grate bars whereby-the mass or body of coul or other gas producing materiel employed is supported in an efficient manner Without materially interfering; with the circulation of gases whether or not en rip-draft or a down-draft is utilized.

A further object is to 'provide superposed series of grate bers sopositioned `that the bins of the upper series constitute means for directing' the gas producing materiel upon .the bars of a. lowerseries, the bars of the several series being so positioned relative to one an other that the materiel Will be'bcnked upon the lower bers to produce longitudinal conduits or spaces between the banlrsof materiel through which the gases ere free-to circulate While passing upwardly 0r downwardly through the coni.

Another object is to provide grate bars which are so mounted et their ends as 'to eil'ectuelly prevent coul or other'materiel I' from sifting between. the ends ot the bei-s und. the walls of the furnace, or from cloggnig the furnace et these points.

A still further object is to provide suilicient 'means for engaging the ends oil the bars to hold them rigidly against displace- Incnt'either verticzillv or horiztmtnll'v.

Another object is toprovide grote bars designed to be'cool'ed by witter or other coolingiiuid supplied to the interiors thereof, in cese of n liquid the lluid 1within the bers of each of the up er sind lower series being' maintained at i depcndcntly predetermined levels by mechanism provided for that uurpose.

A further Objectis to provide menus interposed between the serios of gratos und deg signed lto beectucted longitudinztlly of the bers for forcing the,. incteriid `from the lower bars after it has Ybeen sufficiently cokcd or consumed, seid ineens beingl i'luidA cooled and having e fluid cooled extension detcchnhly connected to itfvvhereby it cnn be actuated menuolly'without cai-using discon'dort to the operator. l p

With these und other objects in View the invention'consists of certain novel features of construction and combin ations of parts which Will be hereinafter more fully described und pointed out in the claims.

ln the accompanying drawings is shown the preferred form of the invention.

In seid druwinfrs; l`igurc l is n, vertical longitudinal section through the grate of :i furnace embodying the present improvements. Fig. 2 is :t section on line AMA, Fig. l.I Fig. 3 is nu enlarged vertical transf verse section through e portion of the grate end showing more particularly the ber supporting brackets zit one end of th'e furnace end the filling blocks supp)orted thereby. Fig. 4 is e section on lline C- Fig. 3. Fig. 5 is a. horizontal section through 'some of the filling blocks and showing the adjoining portions of the bers undv their brackets in pien. 6 is e horizontal section through ithe entire furnace' teken on e plane extend-4 ing between the two series of grate bers. Fig. 7 is a longitudinal section through the mechanism utilized for meinteininl` Athe VlWater Within the bers et predetermined evels, the yconnections between said mechanism and the furnace being shown in elevation. Fig. 8.

lis a. plan View of a portion of the graterend showing means Whereb liquid end geeous cooling 'mediums can. e useduithe i ers.

Fig. 9 is a section on line E-F, Fig. 8. Fig. is a section on line G--l-l., Fig. 8.

Referring to the iigures by characters of reference, 1 designates the retort of the-furnace' below which is disposed a bosh 2 designed to extend entirely around the grate of the furnace and provided in one end with partitions 3 forming separate non-communieating water heads 4 and 5 which are su erposed one above the other. Each of tiese water heads communicates through a feed pipe 6 and a return ipe 7 with a tank Shaving water inlets 9. A oat controlled valve 10 is arranged within each of these tanks for the the necks 16 and the bosh 2.

purpose of regulating the supply of water or other liquid to the tank and maintaining it at a predetermined level. Any suitable means, not shown, may be utilized for adjusting the valve so as to cause it to close when the water reaches any level desired. This means may adj ustably support the float carrying lever 1 1 or can be connected to the valve mechanism at any other point. Each of the tanks has a blow-0H pipe 12 whereby excess water or steam 'can be discharged from the tank if necessary. Itis designed, however, to utilize outlet pipes 13 for any steam which might be,

conducted from the waterheads by way of pi es 7. I

he bosh 2 surrounds the choke grate oi the furnace which, as indicated in the drawings, consists of upper and lower 'series of members. The members of the upper series are preferably bars 14 triangular in cross section and provided at their ends with angular necks 15 and 16, respectively. The necks 15 are provided with flanges 17 which are bolted or otherwise secured to the bosh 2 while the necks 16 rest upon a supporting plate 18 which is mounted upon brackets 19 extending from the bosh. Vebs 20 extend from the upper face of the supporting plate to the inner surface of the bosh and are arranged in pairs, each pair forming a pocket 21 Afor the reception of one ofthe necks 16. Those portions of the plate 18 which are located between the webs of each pair are provided with outlet slits or openings 22 closeto the bosh so as to permit the escape of any dust or fine particles which might accumulate between The plate 18 is provided between the pockets 21 with extensions 23 which practically close the spaces between the necks 16.- Each of these-extensions supports a filling block 24 suchas a fire brick which is designed to close the space between the pockets and between the bottom of the retort and the plate 13. It becomes impossible therefore for any ot' the ash ori'uel to sift between the necks and become wasted.

Each of the bars 14 is hollow throughout its extent, the end of the neck 16' being closed while the end of the neck 1.5 is open and designed to register with one of a series Figs. 2 and 3 these bars 14 are placed with their broadest faces downward and in the sameli'orizontal plane. As .they are spaced apartthroughout their lengths it will be obvious that their upper inclined faces l'orni elongated hoppers designed to direct coal onto the bars 26 of the lower series. Each of these bars 26 is of the saine construction as the bars 14. 4The;T are, however, positioned with their broadest i'acps uppermost and in the same horizontal plane, each bar 26 being located directly underthe space between two oi' the upper bars. Thenecks -27 at one end oi' eac-h oi these bars rest within a bracket 28 mounted upon the inner wall ol' the bosh 2, while the other neck 29 of each bar 26 is 1"'y provided with 30 bolted or otherwise fastened to the bosh. This neck 2Q which is open at its ends registers with an opening 31 whereby communication is established with the water head 5.

A tubular passage extends through the bosh at one end ol the furnace and is closed at its outer end by suitable packing 34 in which ismounted a ball capable of partial rotation in any direction. A rod 36 is slidably mounted within .the ball and carries a scraper S7 at its inner end so proportioned as to extend across two or more of the bars oll the lower series and to contact with them.

Rod 36 may be provided with one or more extensions 38 designed to be coupled thereto as at 39. This extension may be tubular and water cooled so that it can be grasped and manipulatedwithout danger ol burningl the' operator.

By referring inntieularlj,Y to Fig. 2 ilv u ill be noted'that the bars 14 and 26 are so positioned rclative'to each other that the coul deposited upon the lower bars will be banked thereon with the outer faces ol' the banks al a proper angle to the horizontal to prevent the coal escaping past the lower bars when fed theretoI It will be noticed that means areeinplojved whereby ,access may be convenientlyhad to the interiors of the various bars of the gra-tc. This means consists ol' passages 40 extending through the bosh and alining with the openings v25 and 31 each passage being closed by asscrew plug 41 or in an;v other preferred manner.

It will be seen ly referring to Figs. S, l) and 10 that if it is desired to circulate. air or other gaseous Huid through the bars either without or simultaneously with a liquid, pipes 42 can be extended through bushings 43, replacing the plug 41 (Figo). These pipes are closed at their inner ends and provided with holes 44 in their upper portions near said ends l'or the escape ol' air etc.

.fr air.-

' mninting the bars and forpreventing mate-y rial from passing through the spaces between e the ends thereof. 'By mounting the bars-l 4V passage or head 4 or 5. Should liquid bey used with the air or other gas the vapor or steam generated will be carried out with the Coal when laced within the retort will be fed downwar ybetween the bars bland onto the Hat upper faces of the bars 26 where it will be banked-as indicated in Fig. 2. lAir conduits or passages will thus be produced between the banks and air or gases will be free to circulate through the body or mass of coal either upwardly` or downwardly accord'- ing. te the direction of draft employed. The

watercontaine'd Within the" bars lwill keep' `them`1n a comparatively cool state and will circulateback and forth through the ipes 6 and 7. Inasmuch as tank 8 is provi( ed for each series ofv bars it willi be ap arent that the level1 of the water within eac isseriescan be maintained' at" anyI desired level by means of the float controlledineclianism heretofore mentioned; To remove the material' from the lower bars 26 the o erator couples the extension 38.t"o one of t! e stems or i'ods 36 and pushes the scraper 37 longit'i'idinally of the adjoining bars soI toforce material laterallpT between said bars.` 'All of the scrapers can be operatei'l in this' manner and ast `ley are preferably water' cooledl there is no danger of' the'ha'ndof the operatorbecoming burned thereby. 'lmportai'ice is attached to' the novel means employed for in this manner onlyv the inclined fares thereof are exposed to' the fueland' tl-ieiefore all of the fuel will be positively directed downward 'fonte the lower bars and none of it. becomes practical grate bar which is ofample 'size 'to wasted. `Another novelty is in mali permit of 'circulatine; large volumes of air througlilit with very littlejriction and of' being able to use the saine grate bar as .a steam generator which will deliverrnomin ally drylsteam. v i

What is cl'aii"`r.1ed'i's,`:` l 1. In a furnace, super-posed series of grate members, the lower members having sub-` stantially horizont-al upper faces and being spaced from each-` otherto permitthe dis@ charge of ash or other residue between .them and .the upper ymembers being` arranged in vertical aline'ment with the spaces between the lower members, said upper members having inclined upper faces to direct material.

on to the substantially horizontal faces of the members 'of the lower series.

2. i errate structure formed ofsuper' osed series of ineii'ibers, allof said membersrv eing s aced from each other to vpermit the disc arge of material between'them,. the lower members being disposed in verticalallnethe circulation .of a cool from each zother to ment with the spaces between the upper members, and said, lower members havingl substantially flat upper faces to permit the ,banking of material thereon.

permit the ready discharge of material there from, and the upper faces-of the lower members being substantially. flat to receive said discharged material, said lower members beinev disposed substantially in vertical alinementA with the space between the upper members 4. In a grate structure, upper and lower series of spaced grate members, said upper.r members having inclined faces for directing material into the spaces therebetween, the

members of the lower series being spaced `from each other to permit the discharge of ash-or other residue between them, said lower members being of greater width than the spaces between the upper members and arranged to receive and support'all material discharged between said upper members.

5. rThe combination with a furnace oi' upper and lower series ofgrate members, the

members ofthe` lower series being disposed below and4 of greater width than the spaces between tlieupper members and having hoii' inilrineans ior permitting 'p medium through zontal. upper faces" the members of each s 6. The'coinliinat'ioirw Y per and lower sei-iesY if ratemembers, the nicinbei's of thoflow seriesdicng disposed below the spaces betweentliei'upi'ier niemithfa'r furnace oi' upbei's moans for )cirinittii'irthe:circulation ol' a cooling mediunr through theineinbcrs ol' each series, and means for vmaintaining the cooling medium in each lseries at a predetermined'le vel. l

7 .i The combination with a furnace of up per and lower seriesoi' grate members, means for permitting independent circulations of a coolingmedium through the members of said series, and means for maintaining the cooling medium in each series at a predetermined level.

8. The combination with a furnace of upper and` lower series of similar grate members, the members of the upper series having their lower faces 4iin the same horizontal plane fthe members oflthewlo'wer series being disposed vbelow V and wider than the spaces between theuppermembers and having flat upper faces `in the same horizontal plane, the membei'sfof the lower series being spaced ermit the discharge of ash orjother residue etween them.

9,l The combination with a furnace; of a bracket supported therebelow and. having i ce Iris

v terposed between the bracket and retort and pockets, grate members, necks extending rom ,the members and seated in the pockets, and devices interposed between the necks and supported by the brackets for filling the spaces between the necks.

10. The combination with a furnace; ol' a -bracket supported therebelw, grate inembers, necks extending from the members and bearing upon the brackets, means for pre venting 'lateral displacement of the necks relative to the bracket, and iilling blocks inf between the necks.

11. The combination with a furnace, and a bosh thereunder, of superposed series of hol low grate members surrounded and supported by the bosh, and means for permitting independent circulations of separate bodies of a cooling medium from the-bosli and through the members of the respective sections.

12. The combination with a furnace and a bosh thereunder; of supeiposed series of hollow grate members surrounded and supported by the bosh, means for permitting independent circulations of a cooling medium l'rom the bosh and through the members oi' the respective series, and trate means for maintaining the cooling liquid in each series at a predetermined level. J

13. A grate comprising upper and lower series of spaced tubular grate members angular in cross section, the members of the upper series having their upper taces converging downwardly, and constituting hoppers, and the members of the lower series having their upper faces disposed in the same horizontal lanes and below and wider than the spaces between the upper members, and'means for permitting separate circulations of a cooling medium through the respective series.

14. A bar support for gas producing furi nuees comprising a bracket having pockets therem, and blocks 'hlhng the spaces between the pockets.

1.5. A support for grate bars comprising a l bracket, webs thereon forming bar receiving Dockets, and filling blocks supported by the bracket and between the pockets, said blocks extending beyond the i ockets.

16. In a furnace, a p urality of upper grate bars separated from each other to permit the discharge of material therebetween, a lower series of bars parallel with said upper' bars and dis osed below the spaces between the upper ars, said up er bars constituting means for feeding fue on to the lower bars, and said lower bars bein of a Width determined by the angle of pi e of the fuel,'such width being suflicient to prevent the direct passage of fuel over the edges of said bars bygravity. p.

17. The combination with a furnace; of a lower series of spaced grate members therein having horizontal top faces and each shaped to support banked material and a series of upper grate members la ping and disposed to direct material onto t e lower members, the space between the upper grate members being of such width as to prevent the feeding of material beyond the angle of pile of a bank which may rest upon the lower grate meinbers.

18. The combination with a furnace; of superposed series of hollow grate members therein, means-for permitting the circulation of a cooling medium through the members, and means for maintaining said medium at a redetermined level in each series of memers.

19. The combination with a furnace and a b'osh thereunder; of superposed series of hollow grate members surrounded and support ed by the bush, each member having one end opening into the bush, and float eontrolled means for each series of members for maintaining a cooling medium within each series at a predetermined level.

In testimony that l claim the foregoing as my own, l have hereto allixed my signature in the presence ol' two witnesses.

lE'lElt G. SUHMUYF. Witnesses:

B.` NORUM, CHARLES PLATNER. 

